Support rust analysis

This is supposed to enable rust analysis for the staff ship only.

lib/feature-flags.js

@@ -68,6 +68,7 @@ var Feature;
     Feature["ExtractToToolcache"] = "extract_to_toolcache";
     Feature["PythonDefaultIsToNotExtractStdlib"] = "python_default_is_to_not_extract_stdlib";
     Feature["QaTelemetryEnabled"] = "qa_telemetry_enabled";
+    Feature["RustAnalysis"] = "rust_analysis";
     Feature["ZstdBundleStreamingExtraction"] = "zstd_bundle_streaming_extraction";
 })(Feature || (exports.Feature = Feature = {}));
 exports.featureConfig = {
@@ -132,6 +133,11 @@ exports.featureConfig = {
         minimumVersion: undefined,
         toolsFeature: tools_features_1.ToolsFeature.PythonDefaultIsToNotExtractStdlib,
     },
+    [Feature.RustAnalysis]: {
+        defaultValue: false,
+        envVar: "CODEQL_ACTION_RUST_ANALYSIS",
+        minimumVersion: "2.19.3",
+    },
     [Feature.QaTelemetryEnabled]: {
         defaultValue: false,
         envVar: "CODEQL_ACTION_QA_TELEMETRY",

lib/init-action.js

@@ -345,6 +345,29 @@ async function run() {
             logger.info(`Setting C++ build-mode: none to ${value}`);
             core.exportVariable(bmnVar, value);
         }
+        // Set CODEQL_ENABLE_EXPERIMENTAL_FEATURES for rust
+        if (config.languages.includes(languages_1.Language.rust)) {
+            const feat = feature_flags_1.Feature.RustAnalysis;
+            const minVer = feature_flags_1.featureConfig[feat].minimumVersion;
+            if (!(await (0, util_1.codeQlVersionAtLeast)(codeql, minVer))) {
+                logger.error(`Experimental rust analysis requires CodeQL version ${minVer} or higher`);
+            }
+            else {
+                const envVar = feature_flags_1.featureConfig[feat].envVar;
+                const expVar = "CODEQL_ENABLE_EXPERIMENTAL_FEATURES";
+                if (process.env[envVar] === "true" ||
+                    (await features.getValue(feat, codeql))) {
+                    core.exportVariable(expVar, "true");
+                }
+                if (process.env[expVar] === "true") {
+                    logger.info("Experimental rust analysis enabled");
+                }
+                else {
+                    logger.error("Experimental rust analysis requested but not enabled. " +
+                        "You must set the CODEQL_ENABLE_EXPERIMENTAL_FEATURES environment variable to true");
+                }
+            }
+        }
         // Restore dependency cache(s), if they exist.
         if ((0, caching_utils_1.shouldRestoreCache)(config.dependencyCachingEnabled)) {
             await (0, dependency_caching_1.downloadDependencyCaches)(config.languages, logger);